CN211578926U - A battery box with integrated structure of PTC heating sheet and heat pipe - Google Patents

Abstract

The utility model discloses a battery box with an integrated structure of a PTC heating piece and a heat pipe, which comprises a hollow battery box body (20); the inner cavity wall of the battery box body (20) is fitted with a plurality of PTC heating pieces an integrated structure (10) with a heat pipe; a battery module (30) is attached and installed on the top of each PTC heating sheet and the integrated structure (10); each PTC heating sheet and a heat pipe integrated structure (10) It comprises a horizontally distributed heat pipe (11); the left and right sides of the heat pipe (11) are respectively clamped with a PTC heating sheet (12). The utility model discloses a battery box with an integrated structure of a PTC heating sheet and a heat pipe. By highly integrating the PTC heating sheet and the heat pipe, the utilization rate of the battery box is improved and the temperature inside the battery box is better balanced.

Description

A battery box with integrated structure of PTC heating sheet and heat pipe

technical field

The utility model relates to the technical field of power batteries, in particular to a battery box with an integrated structure of a PTC heating sheet and a heat pipe.

Background technique

In recent years, the new energy power system of commercial vehicles has pursued the requirements of high grouping rate, short charging time, wide operating temperature and wide coverage area, etc. These requirements reduce the cycle life of the battery. The battery cycle life has increasingly become an important factor to be considered in the structural design of new energy power systems. Therefore, how to prolong the life of the battery cells and provide a more suitable working environment for the battery is very important.

Restricted by the electrochemical performance of lithium-ion batteries, when the battery is charged and discharged at a high rate, the temperature rise is too high and exceeds the optimal working temperature range of the battery cell, resulting in a sharp decrease in the cycle life of the battery cell, and the heating process of the battery cell is localized. In the process of temperature increase, the temperature of the battery cell does not increase uniformly and overall; at the same time, the working environment temperature of vehicles in some areas is low, and the low-temperature discharge capacity of lithium-ion batteries is low, which cannot meet the driving requirements of vehicles.

At present, the design of the heat pipe (see the patent document of patent application No. 201710159269.8) better balances the temperature of the cell and the module, and at the same time, the heat pipe is attached to the battery box, which can achieve rapid cooling of the cell. The existing battery box generally uses a heating film or a positive temperature coefficient thermistor PTC heating sheet to heat the battery core. In this case, either the heating effect is not ideal or the space is too large. At the same time, the state has continuously raised the standard of vehicle subsidies, and the space given to the battery box is getting smaller and smaller.

Therefore, the existing battery box cannot well meet the installation space requirements of commercial vehicle users.

Utility model content

The purpose of the utility model is to provide a battery box with an integrated structure of a PTC heating sheet and a heat pipe, aiming at the technical defects existing in the prior art.

To this end, the utility model provides a battery box with an integrated structure of a PTC heating sheet and a heat pipe, including a hollow battery box body;

The inner cavity wall of the battery box is fitted with a plurality of PTC heating sheets and integrated structures of heat pipes;

A battery module is attached to the top of each PTC heating sheet and heat pipe integrated structure;

Each PTC heater and heat pipe integrated structure includes a horizontally distributed heat pipe;

The left and right sides of the heat pipe are respectively clamped with a PTC heating piece.

Wherein, the integrated structure of each PTC heating sheet and heat pipe is connected with the inner cavity wall of the battery box through a thermally conductive gasket or a liquid thermally conductive adhesive.

Among them, the heat pipe and the PTC heating sheet are integrated on the same plane;

The PTC heating sheet and the heat pipe are connected together by a clip.

Among them, the top of each PTC heating sheet and heat pipe integrated structure is attached to the bottom of the battery module.

Among them, the front and rear ends of the top of the heat pipe have limit parts;

The shape and size of the limiting portion correspond to the shape and size of the inner side wall of the battery box.

Among them, the top of each PTC heating sheet and heat pipe integrated structure has a cell module positioning gap;

The shape and size of the positioning gap of the battery cell module correspond to the shape and size of the battery module to be installed.

The shell of the heat pipe is an aluminum alloy shell.

It can be seen from the above technical solutions provided by the present utility model that, compared with the prior art, the present utility model provides a battery box with an integrated structure of a PTC heating sheet and a heat pipe. The utilization rate of the battery box is improved, and the temperature inside the battery box is better balanced.

At the same time, the integration method of the PTC and the heat pipe adopted by the utility model is scientific, easy to realize, and has a flexible structure, which can be customized according to the size of the application space.

Description of drawings

1 is a schematic structural diagram of a battery box with an integrated structure of a PTC heating sheet and a heat pipe provided by the utility model (at this time, when the battery module is not installed);

2 is a schematic diagram of the assembly of a PTC heating sheet and a heat pipe integrated structure and a battery module in a battery box with a PTC heating sheet and a heat pipe integrated structure provided by the utility model;

3 is a schematic diagram of an integrated structure of a PTC heater and a heat pipe in a battery box with an integrated structure of a PTC heater and a heat pipe provided by the present invention.

Detailed ways

In order to make those skilled in the art better understand the solution of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments.

Referring to FIG. 1 to FIG. 3 , the present invention provides a battery box with an integrated structure of a PTC heating sheet and a heat pipe, including a hollow battery box body 20 ;

The inner cavity wall of the battery box 20 is fitted with a plurality of PTC heating fins and heat pipe integrated structures 10;

A battery module 30 is attached to the top of each PTC heating sheet and heat pipe integrated structure 10;

Each PTC heating sheet and heat pipe integrated structure 10 includes a horizontally distributed heat pipe 11;

The left and right sides of the heat pipe 11 are respectively clamped with a PTC heating piece 12 (ie, a positive temperature coefficient thermistor PTC heating piece).

In the present invention, in terms of specific implementation, each PTC heating piece and heat pipe integrated structure 10 is connected with the inner cavity wall of the battery box 20 by a thermally conductive gasket or liquid thermally conductive adhesive, and by heating the heat pipe and the PTC The sheet is closely attached to the battery case 20 to increase the heat exchange efficiency between the cells and the case.

In the present invention, in terms of specific implementation, the heat pipe 11 and the PTC heating sheet 12 are integrated on the same plane;

The PTC heating sheet 12 and the heat pipe 11 are connected together by a snap.

It should be noted that, for the present utility model, the heat pipe 11 and the PTC heating sheet 12 are integrated on the same plane, which is different from the way of placing the PTC and the heat pipe separately or superimposed in the traditional battery box structural design. The integrated design makes the internal structure of the battery box more compact and improves the utilization rate of PTC stacking.

It should be noted that, for the PTC heating sheet 12, it has a built-in positive temperature coefficient thermistor, and its maximum temperature can be controlled, which is compared with the heating film composed of resistance wires. The use process is safer and more reliable, and the safety performance of the product is improved.

For the present invention, the PTC heating pieces 12 are distributed on both sides of the heat pipe, and the structure is flexible, and the PTC heating pieces 12 can be adjusted according to the size of the installation space.

In the present invention, the PTC heating sheet 12 and the heat pipe are integrated by means of a buckle, the manufacturing process of the buckle is mature, and the PTC heating sheet 12 and the heat pipe are easy to install, disassemble and replace.

In the present invention, in terms of specific implementation, as shown in FIG. 2 , the top of each PTC heating sheet and heat pipe integrated structure 10 is attached to the bottom of the battery module 30 . For the PTC heating sheet and heat pipe integrated structure 10 of the present invention, it can be customized according to the width of the battery core or the battery core module, and the space in the battery box can be fully utilized.

In the present invention, in terms of specific implementation, the front and rear ends of the top of the heat pipe 11 are provided with limiting parts 13;

The shape and size of the limiting portion 13 correspond to the shape and size of the inner side wall of the battery case 20 .

In the present invention, in terms of specific implementation, the top of each PTC heating sheet and heat pipe integrated structure 10 has a cell module positioning gap 14;

The shape and size of the cell module positioning notch 14 correspond to the shape and size of the battery module 30 to be installed.

In the present invention, in terms of specific implementation, the shell of the heat pipe 11 is an aluminum alloy shell, and the heat pipe has a hollow structure. The heat pipe adopts an aluminum alloy shell, which is filled with non-combustible, insulating, and non-toxic working medium, and is welded and sealed with thin aluminum. The overall structure is lightweight and can be customized according to the application environment.

It should be noted that, for the present invention, the shape of the integrated structure 10 of the PTC heating sheet and the heat pipe can be fitted with the inner cavity of the battery case 20 so as to be in contact with the battery case or the water cooling plate on the battery case. Good equalization of the temperature inside the battery box.

For the present invention, the PTC heating sheet 12 is connected to the heat pipe 11 through a buckle. The manufacturing process of the buckle is mature, and the sliding assembly method can be adopted, which makes the integration process of the PTC and the heat pipe easier and more efficient. The integrated structure 10 of the PTC heating sheet and the heat pipe of the present invention can be designed and customized according to the space of the battery box, and the space inside the battery box can be fully utilized.

It should be noted that the integrated structure of the PTC heating sheet and the heat pipe provided by the present invention has excellent performance, simple and convenient assembly, can greatly reduce the space occupied by the two in the battery box, and has a scientific structure, which is easy to form a large-scale industry. It is beneficial to its wide application in the market.

It should be noted that, for the present utility model, the PTC heater and heat pipe integrated structure 10 is to integrate the PTC heater 12 and the heat pipe 11 together, as a component embedded in the battery box of the vehicle power system, as its thermal management It is an important part of the aspect, providing the best temperature working range for the cells and prolonging the life of the cells.

The utility model has a simple structure and is easy to install, and can achieve the effect of heating the PTC heating piece 12 and balancing the heat pipe 11; at the same time, its integrated design concept makes the structure of the battery box more compact, saves space, and is conducive to improving the battery The energy density of the box has a wider range of practical performance.

Compared with the prior art, the battery box with the integrated structure of the PTC heating sheet and the heat pipe provided by the utility model has the following beneficial effects:

1. The utility model is provided with PTC heating sheets on both sides of the heat pipe, which can take into account the temperature increase and balance of the cell;

2. In the present utility model, the PTC heating sheet and the heat pipe are integrated by means of buckles, which is convenient for installation and disassembly and has the advantages of light weight;

3. In the utility model, the integrated design of the PTC heating sheet and the heat pipe has a flexible structure and can be customized according to the application space.

To sum up, compared with the prior art, the utility model provides a battery box with an integrated structure of a PTC heating sheet and a heat pipe, which improves the utilization of the battery box by highly integrating the PTC heating sheet and the heat pipe. rate, and better balance the temperature inside the battery box.

At the same time, the integration method of the PTC and the heat pipe adopted by the utility model is scientific, easy to realize, and has a flexible structure, which can be customized according to the size of the application space.

The above are only the preferred embodiments of the present invention. It should be pointed out that for those skilled in the art, without departing from the principles of the present invention, several improvements and modifications can be made. These improvements and Retouching should also be regarded as the protection scope of the present invention.

Claims (7)

1. A battery case with an integrated structure of a PTC heating sheet and a heat pipe, characterized in that it comprises a hollow battery case (20); The inner cavity wall of the battery box body (20) is fitted with a plurality of PTC heating sheets and a heat pipe integrated structure (10); A battery module (30) is mounted on the top of each PTC heating sheet and heat pipe integrated structure (10); Each PTC heating sheet and heat pipe integrated structure (10) includes a horizontally distributed heat pipe (11); The left and right sides of the heat pipe (11) are respectively clamped with a PTC heating sheet (12). 2 . The battery box with an integrated structure of PTC heating fins and heat pipes according to claim 1 , wherein each PTC heating fin and heat pipe integrated structure ( 10 ) is connected to the inner cavity of the battery box ( 20 ). 3 . Between the walls, they are connected by thermal pads or liquid thermal glue. 3. The battery box with the integrated structure of the PTC heating sheet and the heat pipe according to claim 1, wherein the heat pipe (11) and the PTC heating sheet (12) are integrated on the same plane; The PTC heating sheet (12) and the heat pipe (11) are connected together by a clip. 4. The battery box with the integrated structure of PTC heating sheet and heat pipe according to claim 1, wherein the top of each PTC heating sheet and heat pipe integrated structure (10) is the same as that of the battery module (30). Bottom fit. 5. The battery box with the integrated structure of the PTC heating sheet and the heat pipe according to claim 1, wherein the top and front ends of the heat pipe (11) are provided with limit parts (13); The shape and size of the limiting portion (13) correspond to the shape and size of the inner side wall of the battery box (20). 6. The battery box with the integrated structure of PTC heating sheet and heat pipe according to any one of claims 1 to 5, characterized in that, the top of each PTC heating sheet and heat pipe integrated structure (10) has an electric Core module positioning gap (14); The shape and size of the positioning notch (14) of the battery core module correspond to the shape and size of the battery module (30) to be installed. 7. The battery box with an integrated structure of a PTC heating sheet and a heat pipe according to any one of claims 1 to 5, characterized in that the outer shell of the heat pipe (11) is an aluminum alloy outer shell.

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